Simply put, name the top 15 most polished skilled players. The guys who are the closest to their ceilings when compared to the rest of our minor leaguers. The prime example of a player who's not just ultra talented but extremely polished is albert Pujols. He has maxed out his talent because he has worked very hard at making every part of his game as sound and efficient as possible. That's why he is the best single player in all of baseball IMO.
Again vote for your top 15 polished players and if at all possible give me your rankings which will help to make this more accurate.